different colours have been described. Almost all except blue. Exact information
on the colours link below. This anemone can change the colour of its tentacles,
the larger one adopting a brown and cream combination resembling the colours
of the bird called the Jenny Wren Troglodytes
by Andy Horton
troglodytes - Marine Life Encyclopedia - Habitas
Photograph showing the longitudinal
lines which are less pronounced than in
Similar species: Sagartia ornata. Sagartia
Habitually viviparous, although this is rarely recorded (I have never
seen it). The method of the anemone developing within the body cavity is
not confirmed. Research into similar viviparity in Actinia
equina seems to indicate reproduction is asexual.
This anemones buries about 10 to 50 mm down underneath the sand but
attached to a rock. The anemone stretches its column up so that the oral
disc and spread of tentacles are level with the sand surface. If disturbed
the anemone can disappear completely beneath the sand. A large population
can be present but invisible. The column has to be adaptable to squeeze
between the rocks, which can be embedded close together in the sand.
Link to a picture of a typical intertidal
troglodytes with the tentacles retracted underneath a rock, with a
drooping goblet appearance.
This sea anemone can be abundant on suitable shores exposed by low spring
tides (e.g. Worthing, Sussex). However, these shores
are often depositing shores in the spring and summer, when the anemone
may actually migrate towards the shore as the sand is deposited, and grow
larger under the mussel beds on the pier supports. However, during the
winter gales the sand is often scoured away leaving just the rocks behind
with very little sand. In these circumstances the anemone can demonstrate
a variety of unusual shapes (including the goblet shape), because the column
lacks the sand support it needs. This can also be seen when all but the
very smallest of this species of anemone attaches itself to the underneath
This anemone appears to be intolerant of temperatures in excess
Usually this anemone is medium/strongly adherent
and can only be detached from a rock with great care.
small spider crab has a fascination with all sea anemones
Proportionately large crustaceans, including small crabs. Mostly caprellids,
All British coasts. Norway - Mediterranean (probably only in the north
Supplementary Information 1
Supplementary Information 2
Information wanted: Please send any records of this sea anemone,
with location, date, who discovered it, how it was identified, prevalence,
common name and any other details to
Project EMail Glaucus@hotmail.com.
All messages will receive a reply.